Tire-forming material.



J.; T. USIER. TIRE Hmmm@ MATERIAL. APPLICATION FLED MAY 6, 1914.

1,147,253;- Patented Julyeo, 1915.

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,Thin eJJeJ www2? KOM? e nn srafrns ramena* ernten.

.ronnie L'Isfrnn, or CLEVELAND, oiiIo.

milan-nonnina MATERIAL.

T0 all whom it may concern:

Be it'known that I, JOHN T. Lis'rn'n, va citizen of the United States, .residing at Cleveland, in the `county of Cuyahoga and State of Ohio, have invented a certain new and useful improvement in Tire-Forming Material, of which the following is a full,

clear, and exact description.

This invention relates to tire forming material and has for its chief object to provide tire forming material which will enable tires to be formed more quickly and cheaply than at the present time, and which will result in the production of tires which are better or have longer life than the majority of tires now manufactured.

More specifically, the invention aims to provide a tire forming strip or tire forming material which when applied to the core of a tire forming machine will naturally conform to the shape thereof, so that the formation of wrinkles at the inner periphery of the core and the necessity for stretching the fabric or strip at and adjacentthe outer periphery thereof, will he eliminated. In

other words, when the strip is applied to the core, no part will be under greater stress than any other part.

The subject matter of this invention is substantially the product of the machine and method forming the subject matter of my 'prior a plication, Serial No. 752,580, led March gth, 1913.

In the accompanying s eet of drawings, wherein l have shown the preferred embodi-4 ment of my invention `and a part of the apparatus by which that embodiment may be constructed, Figure l is a side view, withy parts in section, of one end of the machine by which the tire forming strip or tire forming fabric may be made; Fig. 2 is a sectional vview substantially along the line 2-2 of Fig. l; Fig. 3 is a side lview of a section of the tire forming strip or fabricyand Fig. 4, is. an` enlarged perspective view of a portion of the strip, portions being broken away,

Aside from the particular structureor texture of the strip or tire forming material constituting the subject matter of this invention, the chief feature is its shape or contour, or its inherent'jtendency to assume or conform to the sha e of the'core ofatire forming machine, l isjfeature or charac- Specifieaton of Letters 'Patenti teristic is obtained by forming the strip into tubular shape on-a circular or semi-circular core of the same diameter as the core of a tire making machine, and subsequently splittmg orcutting the tube on its inner periphery.

While the present invention does not involve any particular machine for forming the product, in Figs. 1 and 2, I have illustrated'the principal part of a machine which,v may beutilized for the manufacture of the productor tire forming strip'constituting this invention.

An illustration and description of the complete machine is believed ton be unnecessary, and for a complete understanding of the same, reference is had to my prior application previously referred to.

Patented July 2o, i915.

Application filed May 6, 1914. Serial No. 836,602.

The tire forming strlp designated A stantially thatv required to once encircle the core of .a tire making machine. Preferably,

this strip is formed of two layersa and a2 of spirally wound rubberized cords ,orh threads, with the cords of one layer at an angle tothe cords of the other layer, and an intermediate layer ai ofrubloer formed by a spirally wound stri The strip is prefiarably formed in a machine having a traveling ycore composed of an endless chain of 'segment-shamed sections 10, each circular in cross section. These parts are so arranged and are of such size that at the ends of the machine, the sections arrange themselves into semi-circular formation. That is, at eachV end of the chain of core sections, a certain number z of sections are arranged end to end, so as to form a more or less rigid semi=circular core, the lross sectional shape and diameter of which' is the same as the cross sectional .shape and diameter, of the core of the tire forming machine with which the strips are subsen quently employed. The machine also vincludes a' frame 1l which supports two concentric -rotary drums12 and 13 which are rotated in `opposite directions. Supported from the endsfof these drums are-two circuler winders. 1a andi-@through which, the.-

carried by the drums 12 and 13 respectively, and pass from the ends thereof diagonally inwardly toward the. core, and through openings in the winders 14 and 15, and thence onto the core, one group of cords or threads engaging the core in advance: of the other. These threads are Wound onto the semi-circular part ofthe traveling core, in such a manner as to form two layers a and a2, with the cords or threads of one layerA wound spirally in one direction, and cords or threads of the other layer wound spirally in the other direction. I prefer also to place between the two layers of threads or cords, a layer of rubber a3 formed from a strip wound spirally on the inner layer or between the two layers 'of threads. ln this case, this layer of rubber is formed from a strip 18 which is supplied onto the traveling endless core from a reel 19 which rotates with the outer drum 12.'

After the-threads and the strip of rubber I are applied onto the core, so as to form the three superimposed closely adhering layers, the latter are compressed by rotary compressors 20, 2l and 22, which engage the inner, outer and side' portions of the periphery of the core or of the outer layer of the .tube formed in the manner stsied. About 180o from the point at which `the materials forming the tube are wound onto the core, that is at the terminus of the semicircular part of the co-re, there is arranged a cutter 28 which cuts the tube on its inner periphery. There is thus formed an open tube which can be conducted at once to the core of a tire forming machine, or can be wound upon a reel for 'subsequent use'in such a machine.

Inasmuch as the strip is formed on a .core

which is circular in cross section trans-l versely and also circular' lengthwise of the strip, the strip not only has an inherent tendency to assume the tubular shape, but it has, as well, a tendency to assume a circul, larshape lengthwise thereof, as shown in Fig. 3. In consequence, when a strip of this character is applied to the core of the tire forming machine whose diameter is equalsubstantially to the diameter of that part of the core of the machine which is utilized in the manufacture of the strip, the said strip will conform to the shape of the core, with practically no wrinkling of the material at the inner periphery of the core, and with little' or no hstretching of the material at the outer periphery. This permits the tires to be formed much more quickly and cheaply than at the present time, and the fact that all parts of the strip are under the same stress or tension when the strip `is `ap-1 plied to the core of the tire forming machine enables Inore durable and eilicient tires to be made.

ency to conform substantially to the cross sectionaland circumferential shape of the core when applied thereto.

As an article of manufacture, a tire forming strip adapted to beV applied to the circular core of'a tire forming machine and comprising a layer of spirally wound material, said strip having an inherent tendency to conform substintially to the cross sectional and circular shape of the core when applied thereto.

3. As an article of manufacture, a tire forming strip adapted to be applied to the circular core of a tire forming machine, said strip being composed of a plurality of closely adhering layers and having an inherent tendency to conform substantially to the cross sectional and circular shape of the core when applied thereto. i

4. As an article of manufacture, a tire forming strip adapted to be applied to the circular core of a tire forming machine, said strip comprising a plurality of layers formed of spirally wound tire forming 1 material with the material of one layer at an angle to the materialof an adjacent layer and said strip having an inherent tendency to conform substantially to the cross sectional and circular shape of the core when applied thereto.

5. As an article of manufacture, a tire forming strip adapted to be applied to thc circular core of a tireforming'machine, said strip having an inherent tendency to conform substantially to the cross sectional and circular shape of the core when applied thereto, and composed of a plurality of layers of strip forming material and an inten vening layer of rubber.'l

6.As an article of manufacture, 4a tire forming .strip adapted to be appliedto the circular core of a tire forming machine, said strip having an inherent tendency to conform substantially to the cross sectional and circular vshape lof the core when applied thereto, and comprising two layers of strip forming material wound spirally in opposite directlons, and an intermediate layer of rubber. y

7 Atire forming strip adapted to be apmachine, said strip having an inherent tendf ency to conformsuhstantially tofthe crossplied to the circular core of a tire forming I layer of closely adhering adhesive ronds eX- tendingfrorn one edge ofthe strip' to thev other.

8. A tire forming strip adapted to be applied to the circular core of a tire forming machine, said strip having an inherent tendeney to conform substantially to the crossseotonal and circumferential shape of the core when applied thereto, and comprising tvif'o layers of rnbberzel cords with the 1o cords of one layer at an of the 'other layer. In testimony whereof, I hereunto aix my signature in the presence of two Witnesses. JOHN T. LISTER.

angle to the ords Witnesses: v

A. F. Kwis, L. I. PORTER,

opies of this patent may be obtained for ve cents each, by addressing the "Commissioner of Patents,

Washington, D. C." 

